Product Description:

The E21NCHT-LDN-SS-04 hybrid stepper motor is produced by Kollmorgen as part of the E Hybrid Stepper Motors series. Designed for motion controllers that index light loads in pick-and-place heads, labeling lines, or small gantries, the unit converts two-phase current into repeatable discrete motion. Each electrical pulse advances the shaft by a fixed increment, allowing precise positioning without feedback devices and making the motor a dependable component for compact automation where footprint and reliability must be balanced.

Mechanically, the frame matches the NEMA 23 outline, so the pilot, bolt circle, and shaft height align with standard 57 mm accessories. A full electrical step equals 1.8 degrees, yielding 200 commanded positions per revolution, while positional error is limited to ±1.5% because of tight tooth tolerances. Kollmorgen’s SIGMAX construction reduces flux leakage and increases torque in the lower speed range, and a winding optimized for maximum torque at low speed enhances this benefit. The laminated rotor blanks support this operating profile by moderating detent torque. Power and phase signals enter through a System MS connector wired as a four-lead parallel circuit, and the single-stack design conserves axial length without sacrificing stiffness.

The cylindrical body measures 2.25 in in diameter, matching the NEMA mounting style for straightforward flange interchange. A Class B insulation system rated to 130 °C surrounds the stator windings, providing an insulation resistance of 100 megohms and a dielectric withstand rating of 340 VDC for use with typical low-voltage stepper drives. Continuous service is permitted from -20 °C to +40 °C, so the motor can be installed in unconditioned enclosures within this temperature range. Motion is transferred through a double-ended smooth shaft that simplifies coupler or pulley attachment on either end without additional machining.